21646
domain: N
Appears in sequences
- Even 9-gonal (or enneagonal) numbers.at n=39A028992
- a(n) = (2*n+1)*(7*n+1).at n=39A033572
- Euler transform of powers of 2 [ 2,4,8,16,... ].at n=10A034899
- Matrix 8th power of partition triangle A008284.at n=47A050302
- Number of base 14 circular n-digit numbers with adjacent digits differing by 8 or less.at n=4A125449
- Numbers n with property that for each single digit d of n, we can also see the decimal expansion of 2^d as a substring of n. Also n may not contain any zero digits.at n=17A135016
- Expansion of 1/(x^k*(1-x-3*x^(k+1))) for k=5.at n=24A143456
- Ulam's spiral (ESE spoke).at n=37A143855
- Number of integer partitions of n with non-integer median of 0-prepended first differences.at n=49A360691