21236

Appears in sequences

• Numbers k such that in k and k^2 the parity of digits alternates.at n=38A030153
• Number of partitions of n such that the least part occurs exactly twice.at n=47A096373
• 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, 0, 0), (-1, 0, 1), (0, 0, -1), (0, 1, 1), (1, -1, 1)}.at n=9A148964
• p-INVERT of A079977, where p(S) = 1 - S - S^2.at n=13A289845
• Number of integer partitions of n whose negated first differences (assuming the last part is zero) are not unimodal.at n=37A332744
• Triangle read by rows: T(n,k) (1 <= k <= n) = number of n X k Baxter matrices in which all row sums are 1.at n=32A347678