a(n) = (1/C(n,0) - 1/C(n,1) + ... + d/C(n,k))*L, where d = (-1)^k,k = [ n/2 ], L = LCM{C(n,0), C(n,1),..., C(n,n)}.
A025536
a(n) = (1/C(n,0) - 1/C(n,1) + ... + d/C(n,k))*L, where d = (-1)^k,k = [ n/2 ], L = LCM{C(n,0), C(n,1),..., C(n,n)}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =11a(5) =9a(6) =51a(7) =92a(8) =254a(9) =230a(10) =2305a(11) =2130a(12) =25755a(13) =24031a(14) =22519a(15) =42392a(16) =680708a(17) =644868a(18) =11639502a(19) =11085300a(20) =10581510a(21) =10121430a(22) =223092705a(23) =214169076a(24) =1029659598a(25) =991523962a(26) =2868336757a(27) =2769428662a(28) =77636319761a(29) =75131921865
External references
- oeis: A025536