23271

Appears in sequences

• Sum of 12 positive 9th powers.at n=20A004801
• Numerators of continued fraction convergents to sqrt(385).at n=12A041730
• Numbers n such that 151*2^n-1 is prime.at n=6A050617
• Number of products of distinct factorials not exceeding n!.at n=39A101977
• Expansion of x*(1 + x^2 + x^4)/(1 - x - x^3 - x^5 - x^7).at n=23A117761
• a(1)=a(2)=1; a(n) = a(n-2) + a(n-1) + (number of terms from among {a(1), a(2), ..., a(n-1)} which are prime).at n=20A128609
• Number of Carlitz compositions of n with exactly six descents.at n=6A241696
• Integers of the form 8k + 7 that can be written as a sum of four distinct squares of the form m, m + 1, m + 3, m + 5, where m == 2 (mod 4).at n=18A243580
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 557", based on the 5-celled von Neumann neighborhood.at n=27A272926
• G.f.: Sum_{n>=0} Product_{k=0..n-1} ( (1+x)^(n+k) - 1 ).at n=5A338176
• Number of ordered triples (a,b,c) of positive integers less than n with the property that n divides a*b*c.at n=55A352078
• Lesser of 2 successive squarefree semiprimes (k, k+6) sandwiching 5 consecutive nonsquarefree numbers.at n=3A368778