31506

Appears in sequences

• a(1)=1, a(n) is the smallest integer > a(n-1) such that the largest element in the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals n^2.at n=23A070902
• Coefficients of a power series whose convolution consists of only the even-indexed terms of the sequence.at n=48A073707
• Coefficients of a power series whose convolution consists of only the even-indexed terms of the sequence.at n=49A073707
• Generating function A(x) satisfies A(x) = (1+x)^2*A(x^2)^2, with A(0)=1.at n=24A073708
• Sum of generalized tribonacci numbers A001644 and inverted tribonacci numbers A075298.at n=17A075418
• a(n) = (4*n+1)*(4*n+2) = (4*n+2)!/(4*n)!.at n=44A157870
• a(n) = 25*n^2 + 25*n + 6.at n=35A177059
• Starts of runs of 3 consecutive Zeckendorf-Niven numbers (A328208).at n=26A328210
• Numbers that are the sum of six fourth powers in five or more ways.at n=23A345562
• Numbers that are the sum of six fourth powers in exactly five ways.at n=22A345817
• Oblong numbers which are products of four distinct primes.at n=32A358988
• Lesser of 2 successive tetraprimes (k, k+4) sandwiching three consecutive not squarefree numbers.at n=7A367791