45136

Appears in sequences

• 11-gonal (or hendecagonal) pyramidal numbers: a(n) = n*(n+1)*(3*n-2)/2.at n=31A007586
• Expansion of e.g.f.: exp(x)/cosh(sin(x)).at n=9A009295
• Expansion of e.g.f. sin(x)/cos(sinh(x)) (odd powers only).at n=4A009554
• Nearest integer to (Product(n^((1 + log(1 + i))/i^2), {i, 1, n})).at n=27A062487
• Numbers m such that sigma(4m+5) = 6m.at n=6A067679
• Starting positions of strings of three 4's in the decimal expansion of Pi.at n=33A083615
• Numbers n such that the last 9 decimal digits of the n-th Fibonacci number is pandigital 1-9.at n=12A112371
• Numbers n such that phi(n)=d_1!!*d_2!!*...*d_k!! where d_1 d_2 ... d_k is the decimal expansion of n.at n=22A139408
• a(n) = smallest number m such that m^2 and n^2 share no common digits and m^2 and n^2 together use all 10 digits, a(n) = 0 if no such m exists.at n=0A158931
• Denominator of Sum_{k=1..n} 1/A045542(k).at n=8A214391
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 157", based on the 5-celled von Neumann neighborhood.at n=40A270331
• a(n) = sigma(sigma(p(n))) = sum of the divisors of the sum of the divisors of number of partitions of n.at n=30A280101
• Expansion of 1 / ((1 - x)^7*(1 + x)^4).at n=23A299336
• Decimal numbers m such that the product of the binary string of m and the binary string of m in reverse contains the binary string of m as a substring.at n=46A342130
• a(n) is the smallest number whose square uses all the digits but n.at n=1A347144
• Numbers k for which sigma(k)/k = 32/13.at n=1A347203
• Indices of high points in A245340.at n=20A370959
• Number of axis-aligned 2 X 2 squares in the 3D projection of a (3n+2)-dimensional hypercube with side length 2.at n=4A388424
• a(n) = A326127(n) * A389078(n).at n=63A388979