40187

Appears in sequences

• "DHK" (bracelet, identity, unlabeled) transform of A035353.at n=12A035354
• Column 8 of triangle A055898.at n=5A055904
• Consider all Pythagorean triples (X,X+7,Z); sequence gives Z values.at n=16A076294
• Expansion of (1-x)^(-1)/(1-x+x^2-2*x^3).at n=33A077871
• Number of partitions of primes into mutual coprimes > 1.at n=39A086191
• Counterexamples to the conjecture that an even, prime-indexed triangular plus 1 equals a prime or that an odd, prime-indexed triangular minus 2 equals a prime.at n=22A097785
• Define two triangular arrays by: B(0,0)=C(0,0)=1, B(0,r)=C(0,r)=0 for r>0, C(t,-1)=C(t,0); and for t,r >= 0, B(t+1,r)=C(t,r-1)+2C(t,r)-B(t,r), C(t+1,r)=B(t+1,r)+2B(t+1,r+1)-C(t,r). Sequence gives array C(t,r) read by rows.at n=38A177020
• Partial sums of A299272.at n=31A299273
• Semiprimes k such that k+2 and k+6 are primes and k+4 and k+8 are all semiprimes.at n=17A392186