26332

Appears in sequences

• a(n) = C(n,7) + C(n,6) + C(n,5) + C(n,4) + C(n,3) + C(n,2) + C(n,1).at n=16A116082
• Triangle T(n,k) read by rows = number of partitions of n-set into k blocks with distinct sizes, k = 1..A003056(n).at n=46A131632
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (-1, 1, 0), (1, 0, 0), (1, 0, 1)}.at n=8A150318
• a(n) = (2*n^3 + 5*n^2 - 11*n)/2.at n=28A162257
• Number of n X 5 1..2 arrays containing at least one of each value, all equal values connected, rows considered as a single number in nondecreasing order, and columns considered as a single number in nondecreasing order.at n=16A166808
• Number of increasing columns in all 2-compositions of n.at n=8A181305
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant in [-n,n].at n=19A211069
• Sum of binomial(n,k) over cubefree k.at n=14A245269
• Number of set partitions of [n] into two blocks with distinct sizes.at n=13A272514
• a(n) is the number of core triads with n nodes up to isomorphism and transposition.at n=11A342795