1244160

Appears in sequences

• Droll numbers: numbers > 1 whose sum of even prime factors equals the sum of odd prime factors.at n=34A019507
• Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*12^j (with i, j >= 0).at n=25A038218
• Triangle whose (i,j)-th entry is binomial(i,j)*6^(i-j)*8^j.at n=23A038262
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*6^j.at n=25A038284
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*2^j.at n=23A038328
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*12^j.at n=16A038338
• Triangle whose (i,j)-th entry is binomial(i,j)*12^(i-j)*12^j.at n=19A038338
• Values of phi in arithmetic progression of at least 6 terms having the same value of phi in A050518.at n=7A050520
• Product of numbers <= n that have a prime factor in common with n.at n=11A066570
• Unsigned member r=-15 of the family of Chebyshev sequences S_r(n) defined in A092184.at n=6A099273
• Numbers of the form (5^i)*(12^j), with i, j >= 0.at n=32A108201
• Terminal point of a repeated reduction of usigma starting at 2^n.at n=21A146891
• Terminal point of a repeated reduction of usigma starting at 2^n.at n=23A146891
• Terminal point of a repeated reduction of usigma starting at 2^n.at n=28A146891
• Composite numbers m such that Product_{i=1..k} (p_i/(p_i-1)) / Sum_{i=1..k} (p_i/(p_i+1)) is an integer, where p_i are the k prime factors of m (with multiplicity).at n=31A230112
• Triangle read by rows, a generalization of the Bernoulli numbers, the denominators for n>=0 and 0<=k<=n.at n=49A292901
• Numbers m such that K(m)/m > K(j)/j for all j < m, where K(m) is the Kalmár function (A074206).at n=33A307867
• Number of double-closed subsets of {1..n}.at n=27A308546
• Indices of records in A332042.at n=38A332043
• Jordan-Polya numbers (A001013) not in A344181.at n=39A344179