20241

Appears in sequences

• Perturbation expansion in quantum field theory: scalar case in 6 spacetime dimensions.at n=4A051862
• Integers 1 through n written in primorial base, summed as if decimal.at n=40A122613
• Binomial transform of [1, 3, 4, 3, 2, 0, 0, 0, ...].at n=22A136395
• a(n) = 10*a(n-1) - 23*a(n-2) for n > 1; a(0) = 1, a(1) = 9.at n=5A163349
• G.f.: (1+x^2+x^3)/(1-x-x^2-x^4-x^5).at n=17A188223
• a(n) = greatest k such that A155043(k+A262509(n)) < A155043(A262509(n)).at n=42A262909
• Number of set partitions of [n] such that nine is a multiple of each block size.at n=11A275427
• Prime time numbers on 6-digit clocks: numbers of the form HMMSS where H, MM, SS are primes, H < 24, MM and SS < 60.at n=12A295014
• Nonprime numbers k of the form 4*m+1 such that Sum_{j=0..k-1} 2^j * binomial(3*j, j) == 1 (mod k).at n=31A373747
• Expansion of e.g.f. exp(x*G(x)) where G(x) = 1 + x*G(x)^4 is the g.f. of A002293.at n=5A380513