22957

Appears in sequences

• a(n) = Sum_{k>=1} floor( 2*(1+sqrt(2))^(n-k) ).at n=10A020963
• Becomes prime after n iterations of f(x) = phi(x)+1 (least inverse of A039651).at n=13A039652
• Number of binary strings of length n with no substrings equal to 0000 0010 or 1101.at n=18A164424
• Number of zero-sum -1..1 arrays of n elements with first through third differences also in -1..1.at n=30A202504
• Number of nX3 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1)X4 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=8A227253
• Sum of the two smallest parts from the partitions of 4n into 4 parts with smallest part = 1.at n=32A239059
• Partial sums of A299900.at n=35A299901
• a(n) = (8*n^3 + 12*n^2 + 4*n - 9)/3.at n=19A358035
• Number of maximum matchings in the n-Cameron graph.at n=8A387596