71022

Appears in sequences

• a(n) = the first row sum of M^(n-1), where M = matrix(4,4, [1,1,1,1;0,1,2,3;0,1,3,6;0,1,4,10]).at n=5A123224
• 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, 1), (-1, 0, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.at n=9A149397
• Number of sets of exactly n positive integers <= n+9 having a square element sum.at n=16A281972
• Oblong numbers which are products of five distinct primes.at n=20A359304
• Place n points in general position on each side of an equilateral triangle, and join every pair of the 3*n+3 boundary points by a chord; sequence gives number of vertices in the resulting planar graph.at n=13A367117
• Triangle read by rows: T(n,k) is the number of noncrossing path sets on n nodes with k paths and isolated vertices allowed, 0 <= k <= n.at n=60A390909