A139160 a(n)=(prime(n)!+2)/2.

2, 4, 61, 2521, 19958401, 3113510401, 177843714048001, 60822550204416001, 12926008369442488320001, 4420880996869850977271808000001, 4111419327088961408862781440000001

Offset

1,1

Comments

For numbers of the form (p(n)!+1)/1 see A139159

For numbers of the form (p(n)!+2)/2 see A139160

For numbers of the form (p(n)!+3)/3 see A139161

For numbers of the form (p(n)!+4)/4 see A139162

For numbers of the form (p(n)!+5)/5 see A139163

For numbers of the form (p(n)!+6)/6 see A139164

For numbers of the form (p(n)!+7)/7 see A139165

For numbers of the form (p(n)!+8)/8 see A139166

For numbers of the form (p(n)!+9)/9 see A139089

For numbers of the form (p(n)!+10)/10 see A139168

For offsets for above sequences see A139169

For smallest integers of the form (p(m)!+n)/n see A139170

Links

Table of n, a(n) for n=1..11.

Mathematica

Table[(Prime[n]! + 2)/2, {n, 1, 30}]

Prog

(PARI) a(n)=prime(n)!/2 + 1 \\ Charles R Greathouse IV, Apr 29 2015

Crossrefs

Cf. A082672, A089085, A089130, A117141, A007749, A139056-A139066, A020458, A139068, A137390, A139070-A139075, A139148-A139157, A139159, A139160-A139166, A139089, A139168-A139170.

Sequence in context: A216758 A018352 A121059 * A367287 A245164 A009744

Adjacent sequences: A139157 A139158 A139159 * A139161 A139162 A139163

Keyword

nonn

Author

Artur Jasinski, Apr 11 2008

Status

approved