1,2

Applying the map as defined in A076340, A076341:

A005117(19)=30=5*3*2=(4+1)*(4-1)*2 -> (4,1)*(4,-1)*(2,0) = (4*4+1,4-4)*(2,0) = (34,0), therefore A076340(30)=34 and A076341(30)=0;

A005117(28)=42=7*3*2=(8-1)*(4-1)*2 -> (8,-1)*(4,-1)*(2,0) = (8*4-1,-8-4)*(2,0) = (62,-24), therefore A076340(42)=62 and A076341(42)=-24, hence 42 is not a term.

Cf. A076348.

Sequence in context: A071999 A031289 A093917 this_sequence A042461 A045486 A075541

Adjacent sequences: A076349 A076350 A076351 this_sequence A076353 A076354 A076355

nonn

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Oct 08 2002