20881

Appears in sequences

• Strong pseudoprimes to base 13.at n=10A020239
• Numbers whose square is palindromic in base 12.at n=24A029737
• "CIK" (necklace, indistinct, unlabeled) transform of 1,2,3,4,...at n=12A032198
• Sums of distinct powers of 12.at n=21A033048
• Sums of 3 distinct powers of 12.at n=5A038493
• The sequence e when b=[ 1,0,1,1,1,... ].at n=42A042953
• Numbers whose base-12 representation has exactly 5 runs.at n=0A043654
• Numbers k such that k^3 is palindromic in base 12.at n=8A046245
• Number of partitions of n with equal nonzero number of parts congruent to each of 0, 1 and 3 (mod 4).at n=60A046779
• Number of points in N^n of norm <= 2.at n=27A055417
• a(n) = (n^2 - n + 1)*(n^2 + n + 1).at n=12A059826
• Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 14 (most significant digit on right).at n=17A061943
• a(n) = 16*n^2 + 4*n + 1.at n=36A082041
• Integers k such that 10^k - 39 is prime.at n=17A108365
• Number of partitions of n which contain their signature as a subpartition.at n=38A118052
• a(n) = ceiling(n^4/4).at n=17A131478
• Totally multiplicative sequence with a(p) = a(p-1) + 9 for prime p.at n=32A166706
• Number of admissible basis in the postage stamp problem for n denominations and h = 5 stamps.at n=4A167812
• Central polygonal numbers that are nontrivially the product of two central polygonal numbers.at n=13A203173
• Number of (v,w,x,y,z) with all terms in {0,1,...,n} and v=average(w,x,y,z).at n=16A212257