30659

Appears in sequences

• Numbers n such that 54*10^n + 1 is prime.at n=12A004203
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1000-1111 pattern in any orientation.at n=10A146689
• Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + (2*j +7)*prime(j)*T(n-2, k-1) with j=10, read by rows.at n=29A153657
• Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + (2*j +7)*prime(j)*T(n-2, k-1) with j=10, read by rows.at n=34A153657
• Number of zero-sum -n..n arrays of 4 elements with first through third differences also in -n..n.at n=33A202512
• Number of k-element subsets S of {1,...,n} such that mean(S)<median(S).at n=15A212149
• a(n) is the smallest number such that there are exactly n numbers k (including a(n) itself) such that U(k) is isomorphic to U(a(n)) (or 0 if no such number exists). Here U(k) is the multiplicative group of integers modulo k.at n=41A303712
• Number of Motzkin meanders of length n with an odd number of humps and an even number of peaks.at n=12A325923