Number of set partitions of [n] with alternating parity of elements and exactly seven blocks.
A305781
Number of set partitions of [n] with alternating parity of elements and exactly seven blocks.
Terms
- a(0) =1a(1) =7a(2) =37a(3) =169a(4) =763a(5) =3287a(6) =14402a(7) =60752a(8) =261772a(9) =1085823a(10) =4614736a(11) =18868613a(12) =79286687a(13) =320425251a(14) =1333901662a(15) =5341972670a(16) =22066221462a(17) =87764483463a(18) =360206083844
External references
- oeis: A305781